IRIS System Requirements

Before installing the latest version of the IRIS Accountancy Suite Software, please ensure that the systems you are using meet or exceed the minimum platform, hardware and software requirements, including service packs, detailed below.


If you have software installed that is not listed below, we strongly recommend that you review the lists of supported software and upgrade as soon as possible. IRIS can not guarantee that the latest version of our software will install successfully or perform effectively, if you are not using versions of the software listed below.

IRIS does not recommend the use of a wireless connection. Any troubleshooting needed will require a wired Ethernet connection.

Using IRIS over a VPN connection without a Terminal Server is unsupported and IRIS offers no guarantees it will work.

Running SQL Server and Exchange on the same server while possible, is not recommended, as it may impact the performance of IRIS Accountancy Suite Software.

Certain features of IRIS Accountancy Suite (notably Filing by Internet to HMRC and Companies House) and online technical support assistance require a broadband internet connection.

Microsoft products – end of life

Microsoft has announced that the following products have or will go out of extended support:

  • SQL Server 2012 – July 2022
  • Windows 8.1 – Professional only – 10/1/2023
  • Office 2013 – 11/4/2023
  • Windows Server 2012/2012 R2 – 10/10/2023

This means that while your IRIS product may continue to work using the above versions, IRIS will no longer test in these environments and will not be able to offer support to customers using them. Remember that being on an older version of any software means that you are not getting the latest security updates. We advise that you are always on the latest versions.

What you need to do next

Our recommendation is to move to the latest versions of the Microsoft software:

  • SQL Server 2012 – SQL Express 2019 or SQL Server 2019
    Note: SQL Express is free but has a limit on the number of users / connections.
  • Windows – Windows 11
  • Office 2013 – Office 2016, 2019 or Office 365 the industry standard
  • Windows Server – Windows Server 2019

The following table will help you plan your upgrades:

Product MS ends extended support IRIS stops support -main release Unable to upgrade from
SQL Server 2012 July 2022 April ’23 v23.1.0 Summer ’23 v23.2.0
Windows 8.1 10/01/2022 April ’23 v23.1.0 Summer ’23 v23.2.0
Office 2013 11/04/2023 Summer ’23 v23.2.0 N/A
Windows Server 2012 / 2012R2 10/10/2023 April ‘24 v24.1.0 Summer ’24 v24.2.0

Click the links below to jump to a section:

Hardware Requirements
Supported Platforms
Software Requirements
Virtual Environments
Microsoft Windows 10 EOL

Hardware Requirements

The requirements below are a guide; a minimum specification for running IRIS on a dedicated server with 1-3 users.

Important: The number of applications running on the server and users you have on the system, will affect performance. For example, for 5-10 users, double the specification below; for 10-20+ users, quadruple the specification, and so on.

Note: We are happy to provide advice on this subject; however, we recommend that you speak to your IT service provider to ensure you have sufficient hardware to run your practice.

Area Standalone or Networked Client Networked P2P Networked Dedicated Server
Processor type Intel Core i3/5/7/9 or AMD Ryzen equivalent
Processor speed 2 GHz 2 GHz 2 GHz
Memory (RAM) 4GB 16GB 16GB
Available hard disk space 15GB or more 20GB or more 20GB or more
Minimum screen resolution 1680 x 1050
Network N/A Bandwidth: 100MbsLatency: <5 ms Bandwidth: 100MbsLatency: <5 ms

Supported Platforms

Standalone, Client or P2P Server and Virtual Environments Microsoft Extended Support Ends IRIS Support Ends (Release)
32-bit or 64-bit versions of:
Windows 8.1: Standard, Professional or Enterprise editions 10//01/2023
Professional only
April 2023 v23.1.0
Windows 10: Home, Professional, Pro Education, Pro for Workstations, Enterprise and Education editions See table
Windows 11: Home and Professional editions
Windows Server
32-bit or 64-bit versions of:
Windows Server 2012: Essentials, Foundation, Standard, Enterprise, or Datacenter editions 10/10/2023 April 2024 v24.1.0
Windows Server 2012 R2: Essentials, Foundation, Standard, Enterprise, or Datacenter editions 10/10/2023 April 2024 v24.1.0
64-bit versions of:
Windows Server 2016, 2019 and 2022: Essentials, Standard or Datacenter editions
Microsoft SQL Server
32-bit or 64-bit versions of:
Microsoft SQL Server 2012: Express, Standard or Enterprise Edition (Service Pack 4) SQL Server 2012 – July 2022 April 2023 v23.1.0
Microsoft SQL Server 2014: (Service Pack 3)
Microsoft SQL Server 2022
Note: Supported from the April 2023 release v23.1
64-bit versions of:
Microsoft SQL Server 2016 (Service Pack 2)
Microsoft SQL Server 2017
Microsoft SQL Server 2019

Note: Microsoft SQL Server Express is only recommended for installations of up to six users. Express versions of SQL Server have a database size limit of 10GB.
Important: Customers who have over 10 users SHOULD use either Workgroup, (only available in SQL2012), Standard or Enterprise versions of SQL Server.

Software Requirements

Microsoft .NET Framework 4.8 as a minimum (mandatory from Autumn 2021 v21.3 release)

The Autumn release of the IRIS Accountancy Suite v21.3 will require our Workstation Setup to be run to ensure that new prerequisites are in place.
To speed up this process and for your convenience, we are advising that .NET 4.8 and MSVC 2019 are installed on the workstation in advance.

Area Requirements Microsoft Extended Support Ends IRIS Support Ends (Release)
.NET Framework Microsoft .NET Framework 4.8 as a minimum
TLS (Transport Security Layers) IRIS supports TLS1.2 from v22.2 (Summer 2022)
Microsoft Office IRIS will work with packages where there are installed versions of the Microsoft Office 365 products.
Microsoft 365 Apps for Enterprise
Office 365 Enterprise E3
Office 365 Enterprise E5
Microsoft 365 Family
Microsoft 365 Personal
Microsoft Office Home & Student 2019
Microsoft 365 Apps for Business
Microsoft 365 Business Standard
Office 365 Nonprofit Business Premium
Microsoft 365 Business Standard
Office 365 Nonprofit E3
Office 365 Nonprofit E5
Office 365 Education E5
Microsoft Office 2010 (Service Pack 1) 13/10/2020
click here
Spring 2021 v21.1.0
Microsoft Office 2013  11/4/2023 Summer 2023 v23.2.0
Microsoft Office 2016
Microsoft Office 2019
Microsoft Office 365
Anti-Virus and Firewall Protection Some Anti-Virus software or Firewall protection may prevent successful installations of IRIS software. In some cases, the anti-virus or firewall software may need disabling while the installation is running. If you require assistance with this, please contact your anti-virus or firewall software supplier.
To address Windows Firewall blocking access, see the following articles:
How to determine if you are using a Static/Dynamic Port
How to configure Windows Firewall for TCP ports IAS-6221,
How to configure Windows Firewall for UDP Port 1434 IAS-5219

Important: Installed versions of Office apps are compatible with IRIS Software; their browser based equivalents are not.

Virtual Environments

We test our products in virtual environments including PCs (HyperV) and Terminal Services along with virtualised hardware i.e. Server/Terminal Server(s)/configuration clusters.

To provide optimum performance in a virtualised cluster, our recommended setup is to have the Application, SQL and Terminal Server(s) on separate virtual machines.

We do not specifically test against the following virtualised environments. Many customers have however, stated that they use these environments without a problem:

  • Citrix
  • VMWare
  • Remote Apps

If you do come across an issue, we will try and help you narrow down the area in the virtual environment that is causing the problem but cannot guarantee resolution in any untested platforms.

Remote Access including Terminal Server access
Remote access to PCs, Servers and Terminal Servers are tested via Microsoft’s Remote Desktop Connection on all supported platforms.

Microsoft Windows 10 EOL

Enter WINVER in the search box to identify the Edition and version of Windows 10 on your PC. In general, if Windows Updates are enabled you can expect the version of your Windows 10 to be updated automatically.

Windows 10 is identified by both Edition and Version details. End of Life (EOL) details differ between Editions. The table below defines where those Editions and Versions sit in terms of End of Service with regards to the Microsoft Modern Life Cycle Policy which our own Support policy follows.

Note: While IRIS products may continue to work using an EOL operating system, they will not be tested in these environments and we will not be able to offer support to customers using them.

Important: From the Autumn 2020 v20.3.0 release, you will not be able to install IRIS on any of the Editions/versions which have reached the EOL status dated May 2020 or before.

Windows 10, version history Date of availability End of service for Home, Pro, Pro Education and Pro for Workstations editions End of service for Enterprise and Education editions
Windows 10, version 1909 November 12, 2019 May 11, 2021 May 10, 2020**
Windows 10, version 1903 May 21, 2019 December 8, 2020 December 8, 2020
Windows 10, version 1809 November 13, 2018 November 10, 2020 May 11, 2021**
Windows 10, version 1803 April 30, 2018 November 12, 2019 May 11, 2021
Windows 10, version 1709 October 17, 2017 April 9, 2019 October 13, 2020

* Windows 10, version 1703 for Enterprise, Education, and IOT Enterprise editions were released on April 11, 2017.
** Serviced for 30 months from release date per policy updated at September 6, 2018.